Amplitude limiting apparatus and multi-carrier signal generating apparatus

A multi-carrier signal generating apparatus having:

• multi-carrier signal generating means for generating a multi-carrier signal in a digital form containing a plurality of subcarrier components, and
• amplitude limiting means for limiting an amplitude of the generated multi-carrier signal,
• the amplitude limiting means including:
• differential signal generating means for generating a differential signal representing a difference between a portion of the generated multi-carrier signal to be limited in amplitude in excess of limit prescribed for the amplitude of the multi-carrier signal and the limit,
• one or more filtering means for filtering the generated differential signal, each of the filtering means filtering out one of one or more bands contained in the multi-carrier signal, each filtered-out band differing from that or those bands taken out by another one of the one or more filtering means, and
• limiting means for limiting the level of the multi-carrier signal by subtracting from the generated multi-carrier signal one or more of the bands filtered out of the differential signal.

A multi-carrier signal generating apparatus having:

• multi-carrier signal generating means for generating a multi-carrier signal in a digital form containing a plurality of subcarrier components, and
• a plurality of amplitude limiting means each for limiting an amplitude of the generated multi-carrier signal,
• each of the plurality of amplitude limiting means including:
• differential signal generating means for generating a differential signal representing a difference between a portion of the generated multi-carrier signal to be limited in amplitude in excess of a limit prescribed for the amplitude of the multi-carrier signal and the limit,
• filtering means for filtering the generated differential signal, the filtering means filters out one of one or more bands contained in the multi-carrier signal, each filtered-out band differing from another band filtered out by the filtering means, and
• limiting means for limiting a level of the multi-carrier signal by subtracting from the generated multi-carrier signal one of the one or more of the bands filtered out of the differential signal,
• each limiting of the level of the multi-carrier signal entered from the multi-carrier signal generating means or the amplitude limiting means of a preceding stage.